DOI: 10.1016/j.atmosenv.2017.09.035
Scopus记录号: 2-s2.0-85030311252
论文题名: A modified Brownian force for ultrafine particle penetration through building crack modeling
作者: Chen C ; , Zhao B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 170 起始页码: 143
结束页码: 148
语种: 英语
英文关键词: CFD
; Indoor air quality
; Lagrangian
; Particles
; Penetration factor
Scopus关键词: Air quality
; Computational fluid dynamics
; Cracks
; Dispersions
; Elementary particles
; Indoor air pollution
; Lagrange multipliers
; Waste disposal
; Waste incineration
; Waste treatment
; Dispersion modeling
; Indoor air quality
; Lagrangian
; Particle dispersion model
; Particle penetration
; Penetration factor
; Treatment and disposal
; User Defined Functions
; Brownian movement
; air quality
; atmospheric modeling
; Brownian motion
; building
; computational fluid dynamics
; crack
; dispersion
; indoor air
; Lagrangian analysis
; particulate matter
; pollution exposure
; ambient air
; Article
; Brownian force
; diffusion
; dispersion
; force
; mathematical analysis
; measurement
; particle size
; priority journal
; surface property
; ultrafine particle
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Combustion processes related to industry, traffic, agriculture, and waste treatment and disposal increase the amount of outdoor ultrafine particles (UFPs), which have adverse effects on human health. Given that people spend the majority of their time indoors, it is critical to understand the penetration of outdoor UFPs through building cracks in order to estimate human exposure to outdoor-originated UFPs. Lagrangian tracking is an efficient approach for modeling particle penetration. However, the Brownian motion for Lagrangian tracking in ANSYS Fluent®, a widely used software for particle dispersion modeling, is not able to model UFP dispersion accurately. In this study, we modified the Brownian force by rewriting the Brownian diffusion coefficient and particle integration time step with a user-defined function in ANSYS Fluent® to model particle penetration through building cracks. The results obtained using the modified model agree much better with the experimental results, with the averaged relative error less than 14% for the smooth crack cases and 21% for the rough crack case. We expect the modified Brownian force model proposed herein to be applied for UFP dispersion modeling in more indoor air quality studies. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82796
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Building Science, School of Architecture, Tsinghua University, Beijing, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Tsinghua University, Beijing, China
Recommended Citation:
Chen C,, Zhao B. A modified Brownian force for ultrafine particle penetration through building crack modeling[J]. Atmospheric Environment,2017-01-01,170